Support read base from queryString

lib/globals.dart

@@ -40,6 +40,7 @@ Config? _prefs;
 EHApi? _api;
 PersistCookieJar? _jar;
 ImageCaches? _imageCaches;
+String? queryBaseUrl;
 
 Future<void> prepareJar() async {
   final jar = PersistCookieJar(storage: FileStorage(await getJarPath()));
@@ -97,6 +98,14 @@ bool tryInitApi(BuildContext context) {
     clearAllStates(context);
     return true;
   }
+  if (queryBaseUrl != null) {
+    if (_api != null && _api!.baseUrl == queryBaseUrl) {
+      return true;
+    }
+    initApi(queryBaseUrl!);
+    clearAllStates(context);
+    return true;
+  }
   String? baseUrl = prefs.getString("baseUrl");
   if (baseUrl == null) {
     SchedulerBinding.instance.addPostFrameCallback((_) {

lib/main.dart

@@ -35,6 +35,24 @@ import 'viewer/single.dart';
 
 final _routerLog = Logger("Router");
 
+bool _isFirst = true;
+
+class _NavigatorObserver extends NavigatorObserver {
+  @override
+  void didPush(Route route, Route? previousRoute) {
+    if (_isFirst) {
+      try {
+        final args = route.settings.arguments as Map<String, String>?;
+        queryBaseUrl = args?["base"];
+      } catch (e) {
+        _routerLog.warning("Failed to get arguments.", e);
+      }
+      _isFirst = false;
+    }
+    super.didPush(route, previousRoute);
+  }
+}
+
 final _router = GoRouter(
   routes: [
     GoRoute(
@@ -289,6 +307,9 @@ final _router = GoRouter(
               });
         }),
   ],
+  observers: [
+    _NavigatorObserver(),
+  ],
 );
 
 void defaultLogger(LogRecord record) {